[S] Change in coreboot[master]: soc/intel/meteorlake: Enable power limits update support for variants

[Subrata Banik (Code Review)]

Attention is currently required from: Tarun Tuli, Kapil Porwal, Sumeet R Pawnikar.

Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75301 )

Change subject: soc/intel/meteorlake: Enable power limits update support for variants
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Patch Set 2:

(1 comment)

File src/soc/intel/meteorlake/Kconfig:

https://review.coreboot.org/c/coreboot/+/75301/comment/a0443f9e_ad994100 
PS2, Line 84: select SOC_INTEL_COMMON_BLOCK_VARIANT_POWER_LIMIT
> Added CONFIG here with intention to enable/use it for all MTL based boards by default with this single entry. So, no need to add this CONFIG for other boards specifically, i.e. less follow up work and no need to define/duplicate the usage of this macro.
>
> It will be useful for other MTL boards as well. Plan is to add/use it one-by-one 
> for all MTL boards.

There is no point to enable a config from SoC unless its applicable for all different mainboards (relying on the SOC). I would request to keep this in rex common for now and then let the respective baseboard to select this.